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LP3988-Q1

SLAS928B – MARCH 2013 – REVISED NOVEMBER 2016

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Copyright © 2013–2016, Texas Instruments Incorporated

Table of Contents

1

Features .................................................................. 1

2

Applications ........................................................... 1

3

Description ............................................................. 1

4

Revision History..................................................... 2

5

Pin Configuration and Functions ......................... 3

6

Specifications......................................................... 4

6.1

Absolute Maximum Ratings ...................................... 4

6.2

ESD Ratings.............................................................. 4

6.3

Recommended Operating Conditions ....................... 4

6.4

Thermal Information .................................................. 4

6.5

Electrical Characteristics........................................... 5

6.6

Timing Requirements ................................................ 6

6.7

Typical Characteristics .............................................. 6

7

Parameter Measurement Information .................. 9

8

Detailed Description ............................................ 10

8.1

Overview ................................................................. 10

8.2

Functional Block Diagram ....................................... 10

8.3

Feature Description................................................. 10

8.4

Device Functional Modes........................................ 11

9

Application and Implementation ........................ 12

9.1

Application Information............................................ 12

9.2

Typical Application ................................................. 12

10

Power Supply Recommendations ..................... 15

11

Layout................................................................... 16

11.1

Layout Guidelines ................................................. 16

11.2

Layout Example .................................................... 16

12

Device And Documentation Support................. 17

12.1

Related Documentation ....................................... 17

12.2

Receiving Notification Of Documentation

Updates.................................................................... 17

12.3

Community Resources.......................................... 17

12.4

Trademarks ........................................................... 17

12.5

Electrostatic Discharge Caution ............................ 17

12.6

Glossary ................................................................ 17

13

Mechanical, Packaging, And Orderable

Information ........................................................... 17

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision A (June 2013) to Revision B

Page

•

Changed "Voltage Regulator" to "LDO" in title of data sheet ................................................................................................ 1

•

Added Device Information and Pin Configuration and Functions sections, ESD Ratings table, Feature Description,

Device Functional Modes, Application and Implementation, Power Supply Recommendations, Layout, Device and

Documentation Support, and Mechanical, Packaging, and Orderable Information sections; changed pin names from

VIN, VOUT and VEN to IN, OUT , and EN ........................................................................................................................... 1

•

Changed Power dissipation from "364 mW" to "469 mW" in Absolute Maxium Ratings table note ...................................... 4

•

Changed RθJA temp from "175°C/W" to "170.5°C/W" in Absolute Maxium Ratings table note .............................................. 4

•

Changed "4.5 mW" to "5.86 mW" in Absolute Maxium Ratings table note ........................................................................... 4

•

Added "High-K" after "Junction-to-ambient thermal resistance"............................................................................................. 4

•

UpdatedThermal Information values and added table note 2 ................................................................................................ 4

•

Added Power Dissipation and Estimating Junction Temperature sections ......................................................................... 14

Changes from Original (March 2013) to Revision A

Page

•

Deleted other voltages and left only 2.5 V ............................................................................................................................. 1

•

Added TI sales note for additional voltages ........................................................................................................................... 1

•

Changed θJA temp from 220°C/W to 175°C/W in Absolute Maxium Ratings table note ........................................................ 4

•

Changed voltage in the title of the first two Typical Characteristics graphs (Ripple Rejection Ratio) from 2.6 to 2.85 ......... 6

•

Changed LP3988Q to correct device name of LP3988-Q1.................................................................................................. 11